--- old/src/solaris/doc/sun/man/man1/jhat.1 2018-11-26 19:43:30.150335636 +0100 +++ /dev/null 2018-10-10 08:50:32.889292854 +0200 @@ -1,136 +0,0 @@ -'\" t -.\" Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved. -.\" DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. -.\" -.\" This code is free software; you can redistribute it and/or modify it -.\" under the terms of the GNU General Public License version 2 only, as -.\" published by the Free Software Foundation. -.\" -.\" This code is distributed in the hope that it will be useful, but WITHOUT -.\" ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or -.\" FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -.\" version 2 for more details (a copy is included in the LICENSE file that -.\" accompanied this code). -.\" -.\" You should have received a copy of the GNU General Public License version -.\" 2 along with this work; if not, write to the Free Software Foundation, -.\" Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. -.\" -.\" Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA -.\" or visit www.oracle.com if you need additional information or have any -.\" questions. -.\" -.\" Arch: generic -.\" Software: JDK 8 -.\" Date: 21 November 2013 -.\" SectDesc: Troubleshooting Tools -.\" Title: jhat.1 -.\" -.if n .pl 99999 -.TH jhat 1 "21 November 2013" "JDK 8" "Troubleshooting Tools" -.\" ----------------------------------------------------------------- -.\" * Define some portability stuff -.\" ----------------------------------------------------------------- -.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -.\" http://bugs.debian.org/507673 -.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html -.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -.ie \n(.g .ds Aq \(aq -.el .ds Aq ' -.\" ----------------------------------------------------------------- -.\" * set default formatting -.\" ----------------------------------------------------------------- -.\" disable hyphenation -.nh -.\" disable justification (adjust text to left margin only) -.ad l -.\" ----------------------------------------------------------------- -.\" * MAIN CONTENT STARTS HERE * -.\" ----------------------------------------------------------------- - -.SH NAME -jhat \- Analyzes the Java heap\&. This command is experimental and unsupported\&. -.SH SYNOPSIS -.sp -.nf - -\fBjhat\fR [ \fIoptions\fR ] \fIheap\-dump\-file\fR -.fi -.sp -.TP -\fIoptions\fR -The command-line options\&. See Options\&. -.TP -\fIheap-dump-file\fR -Java binary heap dump file to be browsed\&. For a dump file that contains multiple heap dumps, you can specify which dump in the file by appending \f3#\fR to the file name, for example, \f3myfile\&.hprof#3\fR\&. -.SH DESCRIPTION -The \f3jhat\fR command parses a Java heap dump file and starts a web server\&. The \f3jhat\fR command lets you to browse heap dumps with your favorite web browser\&. The \f3jhat\fR command supports predesigned queries such as show all instances of a known class \f3MyClass\fR, and Object Query Language (OQL)\&. OQL is similar to SQL, except for querying heap dumps\&. Help on OQL is available from the OQL help page shown by the \f3jhat\fR command\&. With the default port, OQL help is available at http://localhost:7000/oqlhelp/ -.PP -There are several ways to generate a Java heap dump: -.TP 0.2i -\(bu -Use the \f3jmap -dump\fR option to obtain a heap dump at runtime\&. See jmap(1)\&. -.TP 0.2i -\(bu -Use the \f3jconsole\fR option to obtain a heap dump through \f3HotSpotDiagnosticMXBean\fR at runtime\&. See jconsole(1) and the \f3HotSpotDiagnosticMXBean\fR interface description at http://docs\&.oracle\&.com/javase/8/docs/jre/api/management/extension/com/sun/management/HotSpotDiagnosticMXBean\&.html -.TP 0.2i -\(bu -Heap dump is generated when an \f3OutOfMemoryError\fR is thrown by specifying the \f3-XX:+HeapDumpOnOutOfMemoryError\fR Java Virtual Machine (JVM) option\&. -.TP 0.2i -\(bu -Use the \f3hprof\fR command\&. See the HPROF: A Heap/CPU Profiling Tool at http://docs\&.oracle\&.com/javase/8/docs/technotes/samples/hprof\&.html -.SH OPTIONS -.TP --stack false|true -.br -Turns off tracking object allocation call stack\&. If allocation site information is not available in the heap dump, then you have to set this flag to \f3false\fR\&. The default is \f3true\fR\&. -.TP --refs false|true -.br -Turns off tracking of references to objects\&. Default is \f3true\fR\&. By default, back pointers, which are objects that point to a specified object such as referrers or incoming references, are calculated for all objects in the heap\&. -.TP --port \fIport-number\fR -.br -Sets the port for the \f3jhat\fR HTTP server\&. Default is 7000\&. -.TP --exclude \fIexclude-file\fR -.br -Specifies a file that lists data members that should be excluded from the reachable objects query\&. For example, if the file lists \f3java\&.lang\&.String\&.value\fR, then, then whenever the list of objects that are reachable from a specific object \f3o\fR are calculated, reference paths that involve \f3java\&.lang\&.String\&.value\fR field are not considered\&. -.TP --baseline \fIexclude-file\fR -.br -Specifies a baseline heap dump\&. Objects in both heap dumps with the same object ID are marked as not being new\&. Other objects are marked as new\&. This is useful for comparing two different heap dumps\&. -.TP --debug \fIint\fR -.br -Sets the debug level for this tool\&. A level of 0 means no debug output\&. Set higher values for more verbose modes\&. -.TP --version -.br -Reports the release number and exits -.TP --h -.br -Dsiplays a help message and exits\&. -.TP --help -.br -Displays a help message and exits\&. -.TP --J\fIflag\fR -.br -Passes \f3flag\fR to the Java Virtual Machine on which the \f3jhat\fR command is running\&. For example, \f3-J-Xmx512m\fR to use a maximum heap size of 512 MB\&. -.SH SEE\ ALSO -.TP 0.2i -\(bu -jmap(1) -.TP 0.2i -\(bu -jconsole(1) -.TP 0.2i -\(bu -HPROF: A Heap/CPU Profiling Tool at http://docs\&.oracle\&.com/javase/8/docs/technotes/samples/hprof\&.html -.RE -.br -'pl 8.5i -'bp